Researchers Drill Into Super Hot Rocks for Geothermal Energy Breakthrough

Energy researchers have achieved a significant milestone in geothermal energy by drilling into underground rocks heated to a remarkable temperature of 752 degrees Fahrenheit beneath a forest in Oregon. The team from Mazama Energy is exploring the potential of these “super hot rocks” to create a continuous, cleaner power source, marking what they describe as a “world premiere” in the field.

According to Alain Bonneville, chief geoscientist at Mazama, the project involves creating an artificial reservoir between two wells. This setup allows for the injection of cold water, which then converts to steam as it interacts with the hot rocks. The steam drives a turbine to generate electricity, presenting a sustainable alternative to conventional energy sources. Bonneville stated, “The goal of this project is really to demonstrate that the techniques we have been using were successful in creating this reservoir.”

Geothermal energy projects vary in design, with some utilizing shallower drilling techniques to capture warm underground air for heating and cooling purposes. The U.S. Department of Energy recognizes the diversity in geothermal systems, highlighting their potential to provide reliable energy solutions. In a similar vein, Quaise Energy is pursuing deeper drilling, aiming to access nearly limitless thermal energy at depths of 12 miles.

Mazama’s work in central Oregon has the potential to revolutionize energy accessibility, with a single well capable of powering up to 25,000 homes while consuming 75% less water than traditional geothermal systems. The company continues to explore drill depths of 2 miles or more to fully exploit this energy source, which could significantly reduce electricity costs.

The Newberry Volcano, located in the Cascades volcanic arc and recognized as the largest volcano in the region, provides a unique backdrop for this initiative. Its last eruption occurred approximately 1,300 years ago, and it remains classified as an active volcano. The U.S. Geological Survey has documented its explosive history, including a major eruption around 75,000 years ago that formed caldera lakes.

The current shift in federal energy policy has increasingly favored cleaner energy sources, allowing geothermal projects like Mazama’s to gain traction. The administration’s support for renewable energy aligns with ongoing efforts to mitigate air pollution, a significant public health concern identified by the World Health Organization, which affects 99% of the global population and is linked to respiratory issues.

Local geoscience intern Ashlynn Bowles expressed optimism about the project’s impact on her community in Prineville, Oregon. With numerous data centers in the area consuming vast amounts of electricity, she emphasized the importance of finding sustainable energy solutions for the future. “Looking to the future for solutions for where we’re going to see that energy come from is very important,” Bowles noted.

Mazama’s groundbreaking work in geothermal energy not only exemplifies innovative research but also addresses the pressing demands of electricity consumption in rapidly developing regions. As the project progresses, it may pave the way for cleaner, more affordable energy options both in Oregon and beyond.